Move ServiceStatuses from trove.instance to trove.common

This is a part of refactoring intended to reduce dependency
of trove.guestagent on server-side related packages

Implements: blueprint separate-guestagent-related-code

Change-Id: I120d5fcd51bbbaa71b67f841cec37ea7b4358465
Merge "Move ServiceStatuses from trove.instance to trove.common"